如何在 ASP.net MVC 5 中使用 @Html.EditorFor 自动填充表单中的字段？

Question

我正在使用 Visual Studio for asp.net mvc 5 的自动生成表单，它将信息保存到数据库中。它是带有实体框架的 asp.net 标准脚手架等的创建视图。

我喜欢表单的外观，但我需要一个字段（创建日期）至少可以自动填充（但最好是自动填充和隐藏）。问题是我根本不理解自动生成的代码，而且我查找它的努力没有成功。我也没有努力去理解它。我仍然是 html 助手的初学者，我认为这些是。

这是我正在使用的表单元素。中间的部分是我需要更改为自动填充的部分（创建日期字段），我认为相关部分正在更改 EditorFor。但我不知道：

@using (Html.BeginForm())
{
@Html.AntiForgeryToken()


            <div class="form-horizontal">
                <h4>New Patient:</h4>
                <hr />
                @Html.ValidationSummary(true, "", new { @class = "text-danger" })

... //为简单起见删除了其他表单项

    <div class="form-group">
        @Html.LabelFor(model => model.DateCreated,"Date Created", htmlAttributes: new { @class = "control-label col-md-2" })
        <div class="col-md-10">
            @Html.EditorFor(model => model.DateCreated, new { htmlAttributes = new { @class = "form-control" } })
            @Html.ValidationMessageFor(model => model.DateCreated, "", new { @class = "text-danger" })
        </div>
    </div>

... //为简单起见，省略了更多项目

    <div class="form-group">
        <div class="col-md-offset-2 col-md-10">
            <input type="submit" value="Create" class="btn btn-default" />
        </div>
    </div>
}

这部分自动生成的控制器如下所示：

// GET: Subjects/Create
    public ActionResult Create()
    {
        return View();
    }

    // POST: Subjects/Create
    // To protect from overposting attacks, please enable the specific properties you want to bind to, for 
    // more details see http://go.microsoft.com/fwlink/?LinkId=317598.
    [HttpPost]
    [ValidateAntiForgeryToken]
    public ActionResult Create([Bind(Include = "ID,Name,DOB,Male,Female,Address,City,ZIP,PhoneHome,PhoneCell,Email,EmergencyContact,EmergencyContactPhone,EmergencyContactRelationship,ReferredBy,DateCreated,Allergy,AllergyDescription,HighBloodPressure,LowBloodPressure,HeartCondition,Diabetes,Anemia,HighCholesterol,Pacemaker,Epilepsy,Pregnant,Cancer,STD,Pain,PainDescription,Headache,HeadacheDescription,CommonCold,HighBloodPressureConcern,Stress,Depression,Sleep,Menstruation,Fertility,WeightControl,Other")] Subject subject)
    {
        if (ModelState.IsValid)
        {
            db.SubjectDatabase.Add(subject);
            db.SaveChanges();
            return RedirectToAction("Index");
        }

        return View(subject);
    }

如果您不知道如何自动填充和/或隐藏表单元素 datecreated，请您指出我可以自己学习解决这个问题的地方。我觉得我编程很通情达理，只是对html helpers 或者controller 中的bind 函数不太了解。

Answer 1

从您的视图中删除此部分

 <div class="form-group">
        @Html.LabelFor(model => model.DateCreated,"Date Created", htmlAttributes: new { @class = "control-label col-md-2" })
        <div class="col-md-10">
            @Html.EditorFor(model => model.DateCreated, new { htmlAttributes = new { @class = "form-control" } })
            @Html.ValidationMessageFor(model => model.DateCreated, "", new { @class = "text-danger" })
        </div>
    </div>

然后，在您的 Controller 中，从 Bind 属性中删除 DateCreated 并分配 DateCreated 属性：

    [HttpPost]
    [ValidateAntiForgeryToken]
    public ActionResult Create([Bind(Include = "ID,Name,DOB,Male,Female,Address,City,ZIP,PhoneHome,PhoneCell,Email,EmergencyContact,EmergencyContactPhone,EmergencyContactRelationship,ReferredBy,Allergy,AllergyDescription,HighBloodPressure,LowBloodPressure,HeartCondition,Diabetes,Anemia,HighCholesterol,Pacemaker,Epilepsy,Pregnant,Cancer,STD,Pain,PainDescription,Headache,HeadacheDescription,CommonCold,HighBloodPressureConcern,Stress,Depression,Sleep,Menstruation,Fertility,WeightControl,Other")] Subject subject)
    {
        if (ModelState.IsValid)
        {
            subject.DateCreated = DateTime.Now; //if you want UTC time, use DateTime.UtcNow
            db.SubjectDatabase.Add(subject);
            db.SaveChanges();
            return RedirectToAction("Index");
        }

        return View(subject);
    }

Answer 2

@Value也可以通过@Html.EditorFor来预填充：

例子：

@Html.EditorFor(c => c.Propertyname, new { @Value = "5" })

可以在以下位置找到更多信息： Html.EditorFor Set Default Value